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大型水库常采用叠梁门取水方式作为改善春季下泄低温水的有效手段,但现有的叠梁门调度方式基本为全年使用,可能加剧水库冬季下泄高温水现象,且影响到春季的水温改善效果。提出根据下游鱼类对水温的需求时段来确定叠梁门的启用时段,对金沙江下游的溪洛渡电站水库水温进行了研究,结果表明,分时段采用叠梁门取水可有限程度地提高春季的下泄水温并避免冬季下泄水高温现象的进一步加剧。同时,也研究了河流梯级开发对叠梁门应用的影响,发现水库调节性能、梯级开发、人工调度等带来的下游入库水温平坦化,以及溪洛渡水库的过渡型水温结构,使叠梁门对水温的影响显著减弱。
Large-scale reservoirs often use the multi-girder door water intake as an effective means to improve the release of low temperature water in spring. However, the existing stack door scheduling method is basically used throughout the year, which may exacerbate the discharge of hot water in winter and affect the spring water temperature improvement effect. Based on the demand period of downstream fish for water temperature, this paper proposes to determine the opening period of the double-deck doors and study the water temperature of the Xiluodu hydropower station in the lower reaches of the Jinsha River. The results show that using the double- Water temperature and to avoid the further release of water in winter high temperature phenomenon. At the same time, the influence of cascade development of river cascades on the application of stacked girders was also studied. It is found that the downstream water storage temperature is flattened by the adjustment of reservoir performance, cascade development and manual scheduling, and the transitional water temperature structure of Xiluodu Reservoir, The impact on water temperature is significantly reduced.